Job location: Columbus, OH or Nashville, TN (both locations would be for on site work)
We are seeking a Senior Developer with strong expertise in IBM z/OS Connect to support Gigawatt.ai modernization initiatives by designing and building new z/OS-based services integrated with MACSS (legacy utility management mainframe application). This role focuses on exposing mainframe capabilities as modern APIs and enabling seamless enterprise integration.
- Design, develop, and deploy RESTful APIs using IBM z/OS Connect
- Build and expose mainframe services (CICS, IMS, DB2) to distributed systems
- Integrate z/OS services with MACSS and other enterprise platforms
- Translate business requirements into scalable API-based solutions
- Ensure performance, security, and reliability of z/OS services
- Collaborate with cross-functional teams (middleware, integration, application teams)
- Troubleshoot and resolve issues across z/OS and API layers
- Support modernization initiatives by enabling API-driven mainframe access
Requirements
- Strong hands-on experience with IBM z/OS Connect (EE preferred)
- Solid background in z/OS environment (CICS, IMS, DB2)
- Experience building and consuming REST APIs
- Knowledge of JSON, OpenAPI/Swagger
- Familiarity with mainframe integration patterns
- Strong debugging and performance tuning skills on z/OS
- Experience working in enterprise, high-availability environments
- Experience with API management tools (e.g., IBM API Connect)
- Exposure to middleware/integration platforms
- Understanding of security protocols (OAuth, JWT, RACF)
- Prior experience with legacy system modernization initiatives
Skills Required
- Strong hands-on experience with IBM z/OS Connect
- Solid background in z/OS environment (CICS, IMS, DB2)
- Experience building and consuming REST APIs
- Knowledge of JSON and OpenAPI/Swagger
- Strong debugging and performance tuning skills on z/OS
- Experience in enterprise, high-availability environments
What We Do
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